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CIFS: reconnect thread reschedule itself

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In case of error, smb2_reconnect_server reschedule itself
with a delay, to avoid being too aggressive.

Signed-off-by: Germano Percossi <germano.percossi@citrix.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Germano Percossi 2017-04-07 12:29:36 +01:00 committed by Steve French
parent 40920c2bb1
commit 18ea43113f
1 changed files with 9 additions and 1 deletions
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10
fs/cifs/smb2pdu.c
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@ -2181,6 +2181,9 @@ void smb2_reconnect_server(struct work_struct *work)
struct cifs_tcon *tcon, *tcon2;
struct list_head tmp_list;
int tcon_exist = false;
int rc;
int resched = false;
/* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
mutex_lock(&server->reconnect_mutex);
@ -2208,13 +2211,18 @@ void smb2_reconnect_server(struct work_struct *work)
spin_unlock(&cifs_tcp_ses_lock);
list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
if (!smb2_reconnect(SMB2_INTERNAL_CMD, tcon))
rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
if (!rc)
cifs_reopen_persistent_handles(tcon);
else
resched = true;
list_del_init(&tcon->rlist);
cifs_put_tcon(tcon);
}
cifs_dbg(FYI, "Reconnecting tcons finished\n");
if (resched)
queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
mutex_unlock(&server->reconnect_mutex);
/* now we can safely release srv struct */